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- The Time Variation of Waveform, Spectrum, and Probability Distribution of Random Process of Noises and Signals. 随机过程杂讯及讯号之波形、频谱及机率分布之时变特性。
- When nonlinearities and time variation are present, the very basis for classical techniques is removed. 当系统存在非线性和时变特性时,经典方法赖以存在的基础就不存在了。
- The simulation and testing results show that the control method can overcome time variation and unkn... 预测控制是近年来广泛重视并得到应用的一类新型控制方法。
- This paper examines time variation and determining factors of term risk premium in treasuries listed on Shanghai Stock Exchange. 摘要本文考察了上海证券交易所国债期限风险溢价的时间变化特征及决定因素。
- The time variation of the cosmic ray flux is one of crucial problems in the field of cosmic ray physics, solar geophysics and astrophysics, etc. 宇宙线强度随时间的变化、时间变化的起源和与天体物理因素的联系是宇宙线物理、地球物理和天体物理学科中最复杂的问题之一,具有重要的物理意义。
- Based on the periodicity of active current and the DC-bus voltage variation characteristic with the power flowing between AC source and DC-side capacitor of APF,this paper presents a new linear cycle discrete control method for DC-bus voltage. 针对有源滤波器电流谐波分量检测运算复杂,且在负荷电流变化时出现电源电流畸变现象,从直流侧电容电压与交、直流侧功率传递的关系出发,并结合有功电流的周期性特点,提出了基于直流侧电容电压周期离散控制的新型有源滤波器控制方法。
- Automatic block interval time variation of Nanjing-Chuxian Section on Jin-Pu Railway Line designed by our institute won the excellent design prize of the First National Excellent Designs. 我院设计的津浦线南京至滁县段自动闭塞变更间隔时分工程项目荣获第一届国家优秀设计奖。
- The results of sequential time variation of the rates at different points for five campaigns show that the Fujian active block,as a whole,is moving southeast wards and the magnitude of inner deformation is smaller(about 1mm/a). GPS网5期观测的不同测点速率随时间序列变化结果显示福建活动块体整体向东南方向运动,而块体内部形变量较小(约1mm/a)。
- Abstract: Factors that influence the delay precision of commerical delay detonator were introduced.The charging and pressing technique, variation and time variation law of the composition, the powder processing was discussed. 文摘:介绍了工业延期雷管延期精度的影响因素,并对装配工艺中的装压药工艺方法、药剂变化原因、药剂时间变化规律和制药工艺控制进行了讨论。
- Based on the empirical orthogonal function(EOF) and singular value decomposition(SVD) method the spatial distribution and time variation of soil temperatures in the plateau are analysed. 运用EOF方法分析了各层地温的时空特征,并对不同时段的地温场和降水场进行SVD分解,并讨论了前期地温变化,尤其是10cm地温变化与我区降水之间的关系。
- Aimed at nonlinearity and time variation of hydraulic bending roller system of HC rolling mill, a Fuzzy Radial Basis Function (RBF) Neural Network controller based on Genetic Algorithm is designed. 针对HC轧机液压弯辊系统的非线形和时变性等特点,设计了基于遗传算法的模糊RBF神经网络智能控制系统,改善了系统的性能。
- In multi-van analysis (MVA), the variation sources of product/process quality characteristics are divided into time to time variation, piece to piece variation and within piece variation. 摘要多变异分析将过程质量特征值的变异分为时间变异、产品间变异和产品内变异。
- Variation characteristics of village and its relation with farmland productivity in south-center of Hebei Province. 河北省中南部村落及农田生产力的变化特征。
- The variation characteristics of shallow confined groundwater are similar with phreatic water. 浅层承压水含水组的地下水质变化特征和潜水基本一致。
- Daily Variation Characteristic of Geoelectric Field 大地电场日变化特征
- And then, underground coal porositycalculation method and variational characteristic of coal effective pore volume compressibility are discussed. 进而探讨了煤岩地下孔隙度的计算方法和煤岩有效孔隙体积压缩系数的变化特征。
- Regulation Study of the Variation Characteristics of Gutta-percha in the Bark of Different Variance-typed Eucommia ulmoides Oliv. 不同变异类型杜仲皮含胶性状的变异规律。
- temperature variation characteristic 气温变化特征
- Fruit juices ferment if they are kept a long time. 果汁若是放置很久,就会发酵。
- A preliminary analysis of causes for the spatial and temporal variation characteristics of SSC in the sea area is also made. 对长江口外及邻近海域含沙量时空变化特征的原因进行了初步分析。